”Take It Off,” ”Hungover,” ”Party at a Rich Dude?s House”: In a dance-pop scene with no use for subtlety, Ke$ha may be the most brazen of all. Fortunately, she’s got ”I Kissed a Girl” producer Dr. Luke, who featured her on Flo Rida’s ”Right Round” and worked with her on the hit ”TiK ToK” off of her album Animal. Here he frames her Valley Girl sneer with electro-glam arrangements that make brushing one’s teeth ”with a bottle of Jack” sound like an awesome way to kill the morning-after blues. B+